As her hand-picked group of dancers and choreographers gathered in a Los Angeles studio Wednesday to begin rehearsals for Britney Spears‘ latest video shoot, the troupe was hit with some unpleasant news — the beleaguered pop star has shelved the production.

The reason given for the abrupt change in plans? Brit’s reportedly failed drug test — which rumors on the Internet have chalked up to everything from asthma medication to amphetamines — and her scheduled date in court this Friday, when the video, for her single “Piece of Me,” had been scheduled to be filmed.

Almost as if they had seen into the future, the video’s production team had been preparing for Brit’s absence from rehearsals, seeking out a body double to stand in for the troubled singer during rehearsals — and possibly during portions of the actual shoot itself. However, it appears that even these precautions weren’t enough to keep the video moving forward.

But a source inside Britney’s camp is telling OK! a different story about the cancellation. “The video’s producer was involved in an accident and is not able to film on Friday,” explains a friend of the singer. “They rescheduled it for next week. It’s strictly the production company’s fault and they are paying to compensate for lost time.”